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Svetradugi [14.3K]
2 years ago
6

A hot-water radiator has a surface temperatue of 80 o C and a surface area of 2 m2 . Treating it as a blackbody, find the net ra

te at which it will radiate energy to a 20 o C room (see problem in 1.36)
Physics
1 answer:
faust18 [17]2 years ago
3 0

Answer:

925.04 J/s

Explanation:

T = 80 C = 80 + 273 = 353 K

To = 20 c = 20 + 273 = 293 K

A = 2 m^2

Use the formula for Stefan's law

Energy radiated per second

E = \sigma  A \left ( T^{4}-T_{0}^{4} \right )

E = 5.67 \times 10^{-8}\times 2\left ( 353^{4}-293^{4} \right )

E = 925.04 J/s

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An object is at rest in front of a compressed spring. It travels over a surface that exerts a kinetic frictional force on it and
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Answer:

the object will travel 0.66 meters before to stop.

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so:

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3 years ago
what is the acceleration of a 2,000- kilogram truck if a force of 4,200. N is used to make it start moving forward?
cupoosta [38]

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